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   <div id="projectname">Reranker Framework (ReFr)
   
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   <div id="projectbrief">Reranking framework for structure prediction and discriminative language modeling</div>
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<a href="candidate-set-reader_8_h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright 2012, Google Inc.</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// </span>
<a name="l00004"></a>00004 <span class="comment">// Redistribution and use in source and binary forms, with or without</span>
<a name="l00005"></a>00005 <span class="comment">// modification, are permitted provided that the following conditions are</span>
<a name="l00006"></a>00006 <span class="comment">// met:</span>
<a name="l00007"></a>00007 <span class="comment">// </span>
<a name="l00008"></a>00008 <span class="comment">//   * Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment">//     notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment">//   * Redistributions in binary form must reproduce the above</span>
<a name="l00011"></a>00011 <span class="comment">//     copyright notice, this list of conditions and the following disclaimer</span>
<a name="l00012"></a>00012 <span class="comment">//     in the documentation and/or other materials provided with the</span>
<a name="l00013"></a>00013 <span class="comment">//     distribution.</span>
<a name="l00014"></a>00014 <span class="comment">//   * Neither the name of Google Inc. nor the names of its</span>
<a name="l00015"></a>00015 <span class="comment">//     contributors may be used to endorse or promote products derived from</span>
<a name="l00016"></a>00016 <span class="comment">//     this software without specific prior written permission.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00019"></a>00019 <span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00020"></a>00020 <span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00021"></a>00021 <span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00022"></a>00022 <span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00023"></a>00023 <span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           </span>
<a name="l00025"></a>00025 <span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           </span>
<a name="l00026"></a>00026 <span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00027"></a>00027 <span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00028"></a>00028 <span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00036"></a>00036 <span class="comment"></span>
<a name="l00037"></a>00037 <span class="preprocessor">#ifndef RERANKER_CANDIDATE_SET_READER_H_</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define RERANKER_CANDIDATE_SET_READER_H_</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include &lt;tr1/memory&gt;</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include &lt;vector&gt;</span>
<a name="l00043"></a>00043 
<a name="l00044"></a>00044 <span class="preprocessor">#include &quot;<a class="code" href="candidate-set_8_h.html" title="Class to hold a single training instance for a reranker, which is a set of examples, typically the n-best output of some input process, posibly including a gold-standard feature vector.">candidate-set.H</a>&quot;</span>
<a name="l00045"></a>00045 <span class="preprocessor">#include &quot;<a class="code" href="candidate-set-proto-reader_8_h.html" title="Reads CandidateSetMessage instances and converts them to reranker::CandidateSet instances.">candidate-set-proto-reader.H</a>&quot;</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include &quot;../proto/dataio.h&quot;</span>
<a name="l00047"></a>00047 
<a name="l00048"></a><a class="code" href="candidate-set-reader_8_h.html#aeeaf6dec080528a3f7f8f339d614325c">00048</a> <span class="preprocessor">#define DEFAULT_READER_REPORTING_INTERVAL 100</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span>
<a name="l00050"></a>00050 <span class="keyword">namespace </span>reranker {
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 <span class="keyword">using</span> std::cerr;
<a name="l00053"></a>00053 <span class="keyword">using</span> std::endl;
<a name="l00054"></a>00054 <span class="keyword">using</span> std::string;
<a name="l00055"></a>00055 <span class="keyword">using</span> std::vector;
<a name="l00056"></a>00056 <span class="keyword">using</span> std::tr1::shared_ptr;
<a name="l00057"></a>00057 
<a name="l00062"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html">00062</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_candidate_set_reader.html" title="A class for reading streams of training or test instances, where each training or test instance is a ...">CandidateSetReader</a> {
<a name="l00063"></a>00063  <span class="keyword">public</span>:
<a name="l00065"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a5da309ab0f14c02a3d237b64dedfdd97">00065</a>   <a class="code" href="classreranker_1_1_candidate_set_reader.html#a5da309ab0f14c02a3d237b64dedfdd97" title="Constructs a new instance.">CandidateSetReader</a>(<span class="keywordtype">long</span> reporting_interval =
<a name="l00066"></a>00066                      <a class="code" href="candidate-set-reader_8_h.html#aeeaf6dec080528a3f7f8f339d614325c">DEFAULT_READER_REPORTING_INTERVAL</a>) :
<a name="l00067"></a>00067       max_num_to_read_(-1),
<a name="l00068"></a>00068       max_candidates_per_set_(-1),
<a name="l00069"></a>00069       num_read_(0),
<a name="l00070"></a>00070       num_read_from_file_(0),
<a name="l00071"></a>00071       total_num_read_(0),
<a name="l00072"></a>00072       interval_read_(0),
<a name="l00073"></a>00073       reporting_interval_(reporting_interval) { }
<a name="l00074"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a44f8ba2b5bbd12134bd7d42375ea390e">00074</a>   <a class="code" href="classreranker_1_1_candidate_set_reader.html#a5da309ab0f14c02a3d237b64dedfdd97" title="Constructs a new instance.">CandidateSetReader</a>(<span class="keywordtype">int</span> max_num_to_read,
<a name="l00075"></a>00075                      <span class="keywordtype">int</span> max_candidates_per_set,
<a name="l00076"></a>00076                      <span class="keywordtype">long</span> reporting_interval =
<a name="l00077"></a>00077                      <a class="code" href="candidate-set-reader_8_h.html#aeeaf6dec080528a3f7f8f339d614325c">DEFAULT_READER_REPORTING_INTERVAL</a>) :
<a name="l00078"></a>00078       max_num_to_read_(max_num_to_read),
<a name="l00079"></a>00079       max_candidates_per_set_(max_candidates_per_set),
<a name="l00080"></a>00080       num_read_(0),
<a name="l00081"></a>00081       num_read_from_file_(0),
<a name="l00082"></a>00082       total_num_read_(0),
<a name="l00083"></a>00083       interval_read_(0),
<a name="l00084"></a>00084       reporting_interval_(reporting_interval) { }
<a name="l00085"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#ae84e3289cc6f6ce1e02602364316cb78">00085</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#ae84e3289cc6f6ce1e02602364316cb78">~CandidateSetReader</a>() { }
<a name="l00086"></a>00086 
<a name="l00087"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a50c5cabde0a721417272e14b7b755f40">00087</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#a50c5cabde0a721417272e14b7b755f40">Open</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;filename, <span class="keywordtype">bool</span> compressed, <span class="keywordtype">bool</span> use_base64,
<a name="l00088"></a>00088             <span class="keywordtype">bool</span> reset_counters = <span class="keyword">true</span>) {
<a name="l00089"></a>00089     <span class="keywordflow">if</span> (reset_counters) {
<a name="l00090"></a>00090       <a class="code" href="classreranker_1_1_candidate_set_reader.html#adf4630c93ea0ec46e973f7016aa7bb27" title="Resets this reader so that its internal count of the number of CandidateSet&rsquo;s read goes back to zero...">Reset</a>();
<a name="l00091"></a>00091     }
<a name="l00092"></a>00092     <span class="keywordflow">if</span> (verbosity_ &gt;= 1) {
<a name="l00093"></a>00093       cerr &lt;&lt; <span class="stringliteral">&quot;CandidateSetReader: reading from file \&quot;&quot;</span> &lt;&lt; filename
<a name="l00094"></a>00094            &lt;&lt; <span class="stringliteral">&quot;\&quot;.&quot;</span> &lt;&lt; endl;
<a name="l00095"></a>00095     }
<a name="l00096"></a>00096     <span class="keywordtype">bool</span> reading_from_stdin = filename == <span class="stringliteral">&quot;-&quot;</span>;
<a name="l00097"></a>00097     ConfusionProtoIO::Mode mode =
<a name="l00098"></a>00098         reading_from_stdin ? ConfusionProtoIO::READSTD : ConfusionProtoIO::READ;
<a name="l00099"></a>00099     compressed = reading_from_stdin ? <span class="keyword">false</span> : compressed;
<a name="l00100"></a>00100     reader_ = <span class="keyword">new</span> ConfusionProtoIO(filename, mode, compressed, use_base64);
<a name="l00101"></a>00101     filename_ = filename;
<a name="l00102"></a>00102     num_read_from_file_ = 0;
<a name="l00103"></a>00103   }
<a name="l00104"></a>00104 
<a name="l00118"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#afa8d2312498eb123c00796dbc2dd087a">00118</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#afa8d2312498eb123c00796dbc2dd087a" title="Reads a stream of CandidateSet instances from the specified file or from standard input...">Read</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;filename,
<a name="l00119"></a>00119             <span class="keywordtype">bool</span> compressed,
<a name="l00120"></a>00120             <span class="keywordtype">bool</span> use_base64,
<a name="l00121"></a>00121             <span class="keywordtype">bool</span> reset_counters,
<a name="l00122"></a>00122             vector&lt;shared_ptr&lt;CandidateSet&gt; &gt; &amp;examples) {
<a name="l00123"></a>00123     <a class="code" href="classreranker_1_1_candidate_set_reader.html#a50c5cabde0a721417272e14b7b755f40">Open</a>(filename, compressed, use_base64, reset_counters);
<a name="l00124"></a>00124 
<a name="l00125"></a>00125     <span class="keywordtype">bool</span> reader_valid = <span class="keyword">true</span>;
<a name="l00126"></a>00126     <span class="keywordflow">while</span> (reader_valid) {
<a name="l00127"></a>00127       shared_ptr&lt;CandidateSet&gt; candidate_set = <a class="code" href="classreranker_1_1_candidate_set_reader.html#ad16cad795b1c56cfbf8921309362391f">ReadNext</a>(reader_valid);
<a name="l00128"></a>00128       <span class="keywordflow">if</span> (candidate_set == NULL) {
<a name="l00129"></a>00129         <span class="keywordflow">break</span>;
<a name="l00130"></a>00130       }
<a name="l00131"></a>00131       examples.push_back(candidate_set);
<a name="l00132"></a>00132     }
<a name="l00133"></a>00133     <a class="code" href="classreranker_1_1_candidate_set_reader.html#a0d82d6e2dbef48297556d0b0ec5d9ffb">Close</a>();
<a name="l00134"></a>00134   }
<a name="l00135"></a>00135 
<a name="l00136"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#ad16cad795b1c56cfbf8921309362391f">00136</a>   shared_ptr&lt;CandidateSet&gt; <a class="code" href="classreranker_1_1_candidate_set_reader.html#ad16cad795b1c56cfbf8921309362391f">ReadNext</a>(<span class="keywordtype">bool</span> &amp;reader_valid) {
<a name="l00137"></a>00137     <span class="keywordflow">if</span> (num_read_ == max_num_to_read_) {
<a name="l00138"></a>00138       <span class="keywordflow">return</span> shared_ptr&lt;CandidateSet&gt;();      
<a name="l00139"></a>00139     }
<a name="l00140"></a>00140     <span class="comment">// First, de-serialize next CandidateSetMessage from stream.</span>
<a name="l00141"></a>00141     confusion_learning::CandidateSetMessage tmp_msg;
<a name="l00142"></a>00142     reader_valid = reader_-&gt;Read(&amp;tmp_msg);
<a name="l00143"></a>00143     <span class="keywordflow">if</span> (reader_valid) {
<a name="l00144"></a>00144       <span class="keywordflow">if</span> (verbosity_ &gt;= 3) {
<a name="l00145"></a>00145         cerr &lt;&lt; <span class="stringliteral">&quot;CandidateSetReader: most recent CandidateSetMessage: &quot;</span>
<a name="l00146"></a>00146              &lt;&lt; tmp_msg.Utf8DebugString();
<a name="l00147"></a>00147       }
<a name="l00148"></a>00148     } <span class="keywordflow">else</span> {
<a name="l00149"></a>00149       <span class="keywordflow">return</span> shared_ptr&lt;CandidateSet&gt;();
<a name="l00150"></a>00150     }
<a name="l00151"></a>00151 
<a name="l00152"></a>00152     shared_ptr&lt;CandidateSet&gt; candidate_set(<span class="keyword">new</span> <a class="code" href="classreranker_1_1_candidate_set.html" title="A class to hold a set of candidates, either for training or test.">CandidateSet</a>());
<a name="l00153"></a>00153     candidate_set_proto_reader_.<a class="code" href="classreranker_1_1_candidate_set_proto_reader.html#a210d0ca5accd8310a8dc28d9ace3b76b" title="Fills in the specified CandidateSet based on the specified CandidateSetMessage, crucially constructin...">Read</a>(tmp_msg, max_candidates_per_set_,
<a name="l00154"></a>00154                                      *candidate_set);
<a name="l00155"></a>00155     
<a name="l00156"></a>00156     <span class="keywordflow">if</span> (verbosity_ &gt;= 2) {
<a name="l00157"></a>00157       cerr &lt;&lt; <span class="stringliteral">&quot;CandidateSetReader: candidate set prior to &quot;</span>
<a name="l00158"></a>00158            &lt;&lt; <span class="stringliteral">&quot;feature compilation:&quot;</span> &lt;&lt; endl &lt;&lt; *(candidate_set);
<a name="l00159"></a>00159     }
<a name="l00160"></a>00160 
<a name="l00161"></a>00161     ++num_read_;
<a name="l00162"></a>00162     ++num_read_from_file_;
<a name="l00163"></a>00163     ++total_num_read_;
<a name="l00164"></a>00164     ++interval_read_;
<a name="l00165"></a>00165 
<a name="l00166"></a>00166     <span class="keywordflow">if</span> (interval_read_ == reporting_interval_) {
<a name="l00167"></a>00167       <span class="keywordflow">if</span> (verbosity_ &gt;= 1) {
<a name="l00168"></a>00168         cerr &lt;&lt; <span class="stringliteral">&quot;CandidateSetReader: read &quot;</span> &lt;&lt; num_read_
<a name="l00169"></a>00169              &lt;&lt; <span class="stringliteral">&quot; candidate sets.&quot;</span> &lt;&lt; endl;
<a name="l00170"></a>00170       }
<a name="l00171"></a>00171       interval_read_ = 0;
<a name="l00172"></a>00172     }
<a name="l00173"></a>00173     <span class="keywordflow">return</span> candidate_set;
<a name="l00174"></a>00174   }
<a name="l00175"></a>00175 
<a name="l00176"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a0d82d6e2dbef48297556d0b0ec5d9ffb">00176</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#a0d82d6e2dbef48297556d0b0ec5d9ffb">Close</a>() {
<a name="l00177"></a>00177     <span class="keywordflow">if</span> (verbosity_ &gt;= 1) {
<a name="l00178"></a>00178       cerr &lt;&lt; <span class="stringliteral">&quot;CandidateSetReader: read &quot;</span> &lt;&lt; num_read_from_file_
<a name="l00179"></a>00179            &lt;&lt; <span class="stringliteral">&quot; candidate sets from file \&quot;&quot;</span> &lt;&lt; filename_ &lt;&lt; <span class="stringliteral">&quot;\&quot;. Closing file.&quot;</span>
<a name="l00180"></a>00180            &lt;&lt; endl;
<a name="l00181"></a>00181     }
<a name="l00182"></a>00182     reader_-&gt;Close();
<a name="l00183"></a>00183     <span class="keyword">delete</span> reader_;
<a name="l00184"></a>00184   }
<a name="l00185"></a>00185 
<a name="l00188"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#adf4630c93ea0ec46e973f7016aa7bb27">00188</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#adf4630c93ea0ec46e973f7016aa7bb27" title="Resets this reader so that its internal count of the number of CandidateSet&rsquo;s read goes back to zero...">Reset</a>() {
<a name="l00189"></a>00189     num_read_ = 0;
<a name="l00190"></a>00190     interval_read_ = 0;
<a name="l00191"></a>00191   }
<a name="l00192"></a>00192 
<a name="l00195"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a7288ad426c48448041df81e2be1595bf">00195</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#a7288ad426c48448041df81e2be1595bf" title="Invokes CandidateSetProtoReader::ClearStrings on the internal CandidateSetProtoReader instance...">ClearStrings</a>() {
<a name="l00196"></a>00196     candidate_set_proto_reader_.<a class="code" href="classreranker_1_1_candidate_set_proto_reader.html#ac6fef2bb47660a680a18149af6811d24">ClearStrings</a>();
<a name="l00197"></a>00197   }
<a name="l00198"></a>00198 
<a name="l00199"></a>00199   <span class="comment">// accessors</span>
<a name="l00200"></a>00200 
<a name="l00203"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a7e00605dc435676105c28730554c2c09">00203</a>   <span class="keywordtype">long</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#a7e00605dc435676105c28730554c2c09" title="Returns the number of CandidateSet instances read since the last invocation of the Reset method...">num_read</a>() { <span class="keywordflow">return</span> num_read_; }
<a name="l00204"></a>00204 
<a name="l00206"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#aca3e5ee1a9fc951ab621942e3089bce6">00206</a>   <span class="keywordtype">long</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#aca3e5ee1a9fc951ab621942e3089bce6" title="Returns the total number of CandidateSet instances read.">total_num_read</a>() { <span class="keywordflow">return</span> total_num_read_; }
<a name="l00207"></a>00207 
<a name="l00208"></a>00208   <span class="comment">// mutators</span>
<a name="l00209"></a>00209 
<a name="l00221"></a><a class="code" href="classreranker_1_1_candidate_set_reader.html#a46df40e5ad98bdee0bb0a552512349d5">00221</a>   <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_candidate_set_reader.html#a46df40e5ad98bdee0bb0a552512349d5" title="Sets the verbosity of this reader (mostly for debugging purposes).">set_verbosity</a>(<span class="keywordtype">int</span> verbosity) { verbosity_ = verbosity; }
<a name="l00222"></a>00222 
<a name="l00223"></a>00223  <span class="keyword">private</span>:
<a name="l00224"></a>00224   <span class="comment">// data members</span>
<a name="l00225"></a>00225   ConfusionProtoIO *reader_;
<a name="l00226"></a>00226   <a class="code" href="classreranker_1_1_candidate_set_proto_reader.html" title="A class to fill in a CandidateSet based on a CandidateSetMessage, crucially constructing new Candidat...">CandidateSetProtoReader</a> candidate_set_proto_reader_;
<a name="l00227"></a>00227   <span class="keywordtype">string</span> filename_;
<a name="l00228"></a>00228   <span class="keywordtype">int</span> max_num_to_read_;
<a name="l00229"></a>00229   <span class="keywordtype">int</span> max_candidates_per_set_;
<a name="l00230"></a>00230   <span class="keywordtype">long</span> num_read_;
<a name="l00231"></a>00231   <span class="keywordtype">long</span> num_read_from_file_;
<a name="l00232"></a>00232   <span class="keywordtype">long</span> total_num_read_;
<a name="l00233"></a>00233   <span class="keywordtype">long</span> interval_read_;
<a name="l00234"></a>00234   <span class="keywordtype">long</span> reporting_interval_;
<a name="l00235"></a>00235   <span class="keywordtype">int</span> verbosity_;
<a name="l00236"></a>00236 };
<a name="l00237"></a>00237 
<a name="l00238"></a>00238 }  <span class="comment">// namespace reranker</span>
<a name="l00239"></a>00239 
<a name="l00240"></a>00240 <span class="preprocessor">#endif</span>
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